easy.c: fix global declaration shadowing
dotdot.c: fix global declaration shadowing
url.c: fix SIGSEGV
test 1511: fix enumerated type mixed with another type
getinfo.c: fix enumerated type mixed with another type
setup-vms.h: sk_pop symbol tweak

Newer versions of curl are referencing a sk_pop symbol while the HP
OpenSSL library has the symbol in uppercase only.
url.c: fix parse_login_details() OOM handling
http_digest.c: SIGSEGV and OOM handling fixes
url.c: fix parse_url_login() OOM handling